CN102331274A - Data acquisition circuit - Google Patents
Data acquisition circuit Download PDFInfo
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- CN102331274A CN102331274A CN201110199495A CN201110199495A CN102331274A CN 102331274 A CN102331274 A CN 102331274A CN 201110199495 A CN201110199495 A CN 201110199495A CN 201110199495 A CN201110199495 A CN 201110199495A CN 102331274 A CN102331274 A CN 102331274A
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- throw switch
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Abstract
The invention relates to a data acquisition circuit, and belongs to the technical field of electronic circuits. In the technical scheme, the data acquisition circuit comprises a current source (1), a singlechip (2), a plurality of sensors and a plurality of single-pole double-throw switches, wherein the sensors (3, 4 and 5) and the single-pole double-throw switches (6 and 7) are arranged at intervals, are connected in series to the current source and are connected with the singlechip; the sensors are connected in series to one end of each of the single-pole double-throw switches; and the other end of each of the single-pole double-throw switches is connected with a ground wire (8). The data acquisition circuit has the advantages that: the problem in actual application is solved by a method for detecting voltage by connecting resistors in series in a current source circuit, faults can be detected accurately and quickly to be alarmed emergently, and the positions of the faults also can be determined. In addition, the method is high in speed, accurate and reliable.
Description
Technical field
The present invention relates to a kind of circuit of data acquisition, belong to the electronic circuit technology field.
Background technology
Underworkings has large-scale running devices such as many belts, monkey car in the colliery, need carry out real-time detection to it and guarantee its safe operation, and running into emergency condition must report to the police at once, very high to the real-time reliability requirement.Also do not have a kind of good method to solve this problem at present, have and use communication modes, but real-time is poor, can not satisfy actual needs.A lot of sensor sideslips or backguy or the like are arranged in the time of the belt running; Because Belt Length differs; How accurately and rapidly what have reaches thousands of rice, just needs a lot of sensors carry out safety detection along the line, still detection failure emergency alarm; And it is very crucial that the position that can also know fault generating just seems, also is the technical matters that this area needs to be resolved hurrily.
Summary of the invention
The object of the invention provides a kind of circuit of data acquisition, detection failure emergency alarm accurately and rapidly, and can also know and the position of fault generating solve the problems referred to above that exist in the background technology.
Technical scheme of the present invention is: a kind of circuit of data acquisition; Comprise current source, single-chip microcomputer, plurality of sensors, several single-pole double-throw switch (SPDT)s; Sensor and single-pole double-throw switch (SPDT) separation are serially connected on the current source, and connect single-chip microcomputer; Sensor string is connected on the end of single-pole double-throw switch (SPDT), and the other end of single-pole double-throw switch (SPDT) connects ground wire.
The present invention utilizes the current source circuit resistance in series to detect voltage method to solve the problem in the practical application.
Press different single-pole double-throw switch (SPDT)s, the sensor number that is connected in the circuit changes, and the resistance number of current source connection just changes; So the voltage that current source produces also changes thereupon; Also by fixedly rule variation, if certain single-pole double-throw switch (SPDT) of sensor is pressed, whole piece circuit total voltage is added on the AD passage of single-chip microcomputer the voltage that sensor produces; Just can failure judgement through real-time collection voltage signal; And accurately judge the position of fault generating, the method speed is fast, accurately and reliably.
Said current source model is LM334 three end adjustable constant-flow source devices, the three end adjustable constant-flow source devices that National Semiconductor produces; The single-chip microcomputer model is STC12C5A08S2.
Good effect of the present invention is: the present invention utilizes the current source circuit resistance in series to detect voltage method to solve the problem in the practical application; Detection failure emergency alarm accurately and rapidly; And can also know the position of fault generating, the method speed is fast, accurately and reliably.
Description of drawings
Accompanying drawing 1 is the structural representation of the embodiment of the invention;
Accompanying drawing 2 is embodiment of the invention schematic diagrams;
Among the figure: current source 1, single-chip microcomputer 2, sensor 3,4,5, single-pole double-throw switch (SPDT) 6,7, ground wire 8.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further through embodiment.
Among the embodiment; A kind of circuit of data acquisition comprises current source 1, single-chip microcomputer 2, plurality of sensors, several single-pole double-throw switch (SPDT)s, sensor 3,4,5 and single-pole double-throw switch (SPDT) 6,7 separation; Be serially connected on the current source; And the connection single-chip microcomputer, sensor string is connected on the end of single-pole double-throw switch (SPDT), and the other end of single-pole double-throw switch (SPDT) connects ground wire 8.
Said current source model is LM334 three end adjustable constant-flow source devices, the three end adjustable constant-flow source devices that National Semiconductor produces; The single-chip microcomputer model is STC12C5A08S2.
LM334 is the three end adjustable constant-flow source devices that National Semiconductor produces, and constant current source adjustable extent ratio is 10000:1 in working current, and has 1V to the wide dynamic reference voltage of 40V, and constant-current characteristics is very good.The foundation of constant current source only needs an outer meeting resistance and no longer needs other element.LM334 is the real suspension constant current source that need not the independent current source power supply.In addition, device can oppositely apply voltage and only flow through tens microamperes electric current to 20 V, and in the ac applications occasion, this device not only can be done the rectification while but also can make constant current source.This device also has the sense voltage characteristic that is directly proportional with absolute temperature, therefore also can be used as temperature sensor.Can obtain the constant current source of zero-temperature coefficient drift through external resistance and diode.This constant current source can be used for low-power constant current reference source, biasing networks, and saw-toothed wave generator, surge protection, LED drive and temperature sensor.When as temperature sensor, device is particularly suitable for remote temperature and measures, because the series resistor of long line can not influence measuring accuracy, and only needs the two wires transmission.
System work process:
Press different single-pole double-throw switch (SPDT)s in the practical application, the sensor number that is connected in the circuit changes, and the resistance number of current source connection just changes; Because U=IR so the voltage that current source produces also changes thereupon, presses the single-pole double-throw switch (SPDT) 6 of lower sensor 3; U1=IR1 presses the single-pole double-throw switch (SPDT) 7 of lower sensor 4, U2=IR2; Because all sensor resistances equate R1=R2, and current source current I is invariable, so the voltage that produces on each sensor also is that to equate is U1=U2; So also by fixedly rule variation, the long-living total voltage of whole piece circuit is if the single-pole double-throw switch (SPDT) of sensor 5 is pressed: sensor sum * U1, this voltage are added on the AD passage of single-chip microcomputer STC12C5A08S2 the voltage that sensor produces; Just can failure judgement through real-time collection voltage signal; And accurately judge the position of fault generating, the method speed is fast, accurately and reliably.
Claims (3)
1. the circuit of a data acquisition; It is characterized in that comprising current source (1), single-chip microcomputer (2), plurality of sensors, several single-pole double-throw switch (SPDT)s; Sensor (3,4,5) and single-pole double-throw switch (SPDT) (6,7) separation are serially connected on the current source, and connect single-chip microcomputer; Sensor string is connected on the end of single-pole double-throw switch (SPDT), and the other end of single-pole double-throw switch (SPDT) connects ground wire (8).
2. according to the circuit of the said data acquisition of claim 1; It is characterized in that pressing different single-pole double-throw switch (SPDT)s, the sensor number that is connected in the circuit changes, and the resistance number of current source connection just changes; So the voltage that current source produces also changes thereupon; Also by fixedly rule variation, if certain single-pole double-throw switch (SPDT) of sensor is pressed, whole piece circuit total voltage is added on the AD passage of single-chip microcomputer the voltage that sensor produces; Just can failure judgement through real-time collection voltage signal, and accurately judge the position of fault generating.
3. according to the circuit of claim 1 or 2 said data acquisitions, it is characterized in that said current source model is LM334 three end adjustable constant-flow source devices, the single-chip microcomputer model is STC12C5A08S2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110199495 CN102331274B (en) | 2011-07-18 | 2011-07-18 | Data acquisition circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110199495 CN102331274B (en) | 2011-07-18 | 2011-07-18 | Data acquisition circuit |
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| Publication Number | Publication Date |
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| CN102331274A true CN102331274A (en) | 2012-01-25 |
| CN102331274B CN102331274B (en) | 2013-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110199495 Active CN102331274B (en) | 2011-07-18 | 2011-07-18 | Data acquisition circuit |
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| CN (1) | CN102331274B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102745562A (en) * | 2012-07-18 | 2012-10-24 | 日立电梯（中国）有限公司 | Elevator calling and registering system and elevator |
| CN105293228A (en) * | 2015-11-18 | 2016-02-03 | 广州日滨科技发展有限公司 | Method and system for setting floor ID numbers of elevator hall external calling electronic boards |
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| CN2150453Y (en) * | 1993-02-22 | 1993-12-22 | 栗长祯 | Display for boiler water level |
| EP1172777A2 (en) * | 2000-07-10 | 2002-01-16 | Canon Kabushiki Kaisha | Photovoltaic power generation systems and methods of controlling photovoltaic power generation systems |
| CN200976032Y (en) * | 2006-10-31 | 2007-11-14 | 比亚迪股份有限公司 | Malfunction detection device for resistance wire of heating stove |
| CN101514915A (en) * | 2009-03-26 | 2009-08-26 | 苏州新亚科技有限公司 | Water level sensor |
| CN201754101U (en) * | 2010-07-09 | 2011-03-02 | 北汽福田汽车股份有限公司 | Fuel sensor |
| CN202141779U (en) * | 2011-07-18 | 2012-02-08 | 唐山智诚电气有限公司 | Data acquisition circuit |
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2011
- 2011-07-18 CN CN 201110199495 patent/CN102331274B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2150453Y (en) * | 1993-02-22 | 1993-12-22 | 栗长祯 | Display for boiler water level |
| EP1172777A2 (en) * | 2000-07-10 | 2002-01-16 | Canon Kabushiki Kaisha | Photovoltaic power generation systems and methods of controlling photovoltaic power generation systems |
| CN200976032Y (en) * | 2006-10-31 | 2007-11-14 | 比亚迪股份有限公司 | Malfunction detection device for resistance wire of heating stove |
| CN101514915A (en) * | 2009-03-26 | 2009-08-26 | 苏州新亚科技有限公司 | Water level sensor |
| CN201754101U (en) * | 2010-07-09 | 2011-03-02 | 北汽福田汽车股份有限公司 | Fuel sensor |
| CN202141779U (en) * | 2011-07-18 | 2012-02-08 | 唐山智诚电气有限公司 | Data acquisition circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102745562A (en) * | 2012-07-18 | 2012-10-24 | 日立电梯（中国）有限公司 | Elevator calling and registering system and elevator |
| CN102745562B (en) * | 2012-07-18 | 2014-12-17 | 日立电梯（中国）有限公司 | Elevator calling and registering system and elevator |
| CN105293228A (en) * | 2015-11-18 | 2016-02-03 | 广州日滨科技发展有限公司 | Method and system for setting floor ID numbers of elevator hall external calling electronic boards |
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| Publication number | Publication date |
|---|---|
| CN102331274B (en) | 2013-07-10 |
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Owner name: TANGSHAN ZHICHENG ELECTRIC (GROUP) CO., LTD. Free format text: FORMER NAME: TANGSHAN ZHICHENG ELECTRONIC CO., LTD. |
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Address after: 063021 No. 168, Kai Yue Road, Kaiping District, Hebei, Tangshan City Patentee after: Tangshan Zhicheng electric (Group) Co., Ltd. Address before: 063021 No. 168, Kai Yue Road, Kaiping District, Hebei, Tangshan City Patentee before: Tangshan Zhicheng Electric Co., Ltd. |